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5. Trouble Shooting Instructions

Universal Serial Bus (USB) Specific Problems

Specific

Symptoms

What You

Experience

Possible Solutions

USB interface is
not working

USB peripherals
are not working

• Check that your monitor is turned ON.
• Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream

connector).

• Switch off and then turn on the monitor again.
• Reboot the computer.
• Some USB devices like external portable HDD

require higher electric current; connect the
device directly to the computer system.

SupreSpeed USB
3.0 interface is
slow.

SuperSpeed USB
3.0 peripherals
working slowly
or not working
at all

• Check that your computer is USB 3.0-capable.
• Some computers have USB 3.0, USB 2.0, and

USB 1.1 ports. Ensure that the correct USB port is
used.

• Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream

connector).

• Reboot the computer.

Wireless USB
peripherals stop
working when a
USB 3.0 device
is plugged in

Wireless USB
peripherals
responding
slowly or only
working as
the distance
between itself
and its receiver
decreases

• Increase the distance between the USB 3.0

peripherals and the wireless USB receiver.

• Position your wireless USB receiver as close as

possible to the wireless USB peripherals.

• Use a USB-extender cable to position the wireless

USB receiver as far away as possible from the
USB 3.0 port.

Содержание P2418HT

Страница 1: ...ipment or products It is recommended that service engineers should have repairing knowledge experience as well as appropriate product training per new model before performing the service procedures NOTICE To avoid electrical shocks the products should be connected to an authorized power cord and turn off the master power switch each time before removing the AC power cord To prevent the product awa...

Страница 2: ... with list of items Front Bezel Front Plate Panel Power BD IF BD Main Chassis Key BD Mid Frame Function Key Rubber Foot Rear Cover Cable Cover Stand Cable Clip Release Button Spring USB BD Support Plate USB Cover Lock Holder ...

Страница 3: ...ream port Down stream port Touch module DSUB HDMI HDMI video input HDCP Analog video input Audio jack Audio out Up stream port Down stream port Display port input HDCP USB board 23 8 16 9 1920x1080 LED driver output Function key board WLED LCD IPS panel with in cell touch system LM238WF5 SSA1 Power board AC 110 220V input ...

Страница 4: ...screw size M4x10 Torque 12 0 5kgfxcm Remove the rear cover Tear off the aluminum foil and then disconnect the USB cable and away from the connector of the interface board Use Function key cable a Philips head screwdriver to remove one screw for unlocking the USB unit remove the USB unit from the hooks No 1 screw size M3x5 Torque 4 0 5kgfxcm 1 2 4 3 1 U se a Philips head screwdriver to remove four ...

Страница 5: ...s for unlocking the middle bezel with the assembled unit Use a Philips head screwdriver to remove two screws for unlocking the front bezel Put the bracket chassis module on the protector No 1 9 screw size M3x4 Torque 5 0 5kgfxcm No 10 11 screw size M1 6x3 1 Torque 0 7 0 2kgfxcm 6 11 10 9 5 4 1 2 3 8 7 Remove the interface and power boards from the disconnect all of the cables bracket chassis modul...

Страница 6: ...4 Disassembly and Assembly Procedures ...

Страница 7: ...the interface board Turn over the interface board and locate it into the bracket Use a Philips head screwdriver to tighten two screws for locking the interface board No 1 2 screw size M3x7 5 Torque 6 0 5kgfxcm 2 1 CN2201 S3 4 2 3 1 Panel preparation Examine the panel surface according to inspection criteria Turn over the panel to place screen faced down Take a front bezel and put the front bezel u...

Страница 8: ...or locking the bracket chassis with the panel module No 1 4 Screw size M3x4 Torque 5 0 5kgfxcm Use a Philips head screwdriver to tighten nine screws for locking the middle bezel with the assembled unit Use a Philips head screwdriver to tighten two screws for locking the front bezel Put the bracket chassis module on the panel module No 1 9 screw size M3x4 Torque 5 0 5kgfxcm No 10 11 screw size M1 6...

Страница 9: ...ws for locking the rear cover Stick three pieces of label on the specific positions No 1 4 screw size M4x10 Torque 12 0 5kgfxcm S15 Take a stand close to the monitor Fit the two tabs on the upper part of the stand into the grooves on the back of the monitor and then lower the stand so that the monitor mounting area snaps onto the stand Lift up the monitor to checking the gap between the front beze...

Страница 10: ... and the analog cables from the back of computer 3 Turn on the monitor The floating dialog box should appear on screen against a black background if the monitor cannot sense a video signal and is working correctly While in self test mode the power LED remains white Also depending upon the selected input one of the dialogs shown below will continuously scroll through the screen or or 4 This box als...

Страница 11: ...reen 2 Unplug the video cable s from the back of the computer or monitor The monitor then goes into the self test mode 3 Press and hold Button 1 for 5 seconds A gray screen appears 4 Carefully inspect the screen for abnormalities 5 Press Button 1 on the front panel again The color of the screen changes to red 6 Inspect the display for any abnormalities 7 Repeat steps 5 and 6 to inspect the display...

Страница 12: ...Perform Auto Adjust via OSD Adjust the Phase and Pixel Clock controls via OSD Eliminate video extension cables Reset the monitor to factory settings Change the video resolution to the correct aspect ratio Shaky Jittery Video Wavy picture or fine movement Perform Auto Adjust via OSD Adjust the Phase and Pixel Clock controls via OSD Reset the monitor to factory settings Check environmental factors R...

Страница 13: ...s Do not perform any troubleshooting steps Contact Dell immediately Intermittent Problems Monitor malfunctions on off Ensure that the video cable connecting the monitor to the computer is connected properly and is secure Reset the monitor to factory settings Perform monitor self test feature check to determine if the intermittent problem occurs in self test mode Missing Color Picture missing color...

Страница 14: ...l the height or width of the screen Due to different video formats aspect ratio of DVDs the monitor may display in full screen Run the built in diagnostics Touchscreen Problems Specific Symptoms What You Experience Possible Solutions Touch report error Touch function miss alignment or no touch function Use the Dell provided USB cable to connect your computer Make sure the power cable has a ground ...

Страница 15: ...peripherals working slowly or not working at all Check that your computer is USB 3 0 capable Some computers have USB 3 0 USB 2 0 and USB 1 1 ports Ensure that the correct USB port is used Reconnect the upstream cable to your computer Reconnect the USB peripherals downstream connector Reboot the computer Wireless USB peripherals stop working when a USB 3 0 device is plugged in Wireless USB peripher...

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